Technology

 
 

 

Laser - Quantum Leap in Light

 

LASER - Light Amplification by Stimulated Emission of Radiation - is known in technology as coherent light : producing / emitting light of in-step waves of identical frequency and phase.

The Third Law of Thermodynamics establishes that the orderliness of a system compounds upon itself as increasing levels of order are introduced. Laser light serves as an excellent and extraordinary example of such increased coherence.

Einstein - in his paper "On The Quantum Theory Of Radiation" ( "Zur Quantentheorie der Stralung" / 1917) - extrapolated upon Max Planck's Law of Radiation / Planck's Constant, Planck - Einstein Equation, describing the proportionality constant of a photon and the frequency of its associated electromagnetic wave.

Advances in technology verified the theory and its associated constants and equations. By the late 1950's - 1957 and on - scientists at Bell Labs, Columbia University and Hughes Research were rapidly approaching the breakthrough from theory to a practical laser.

Hughes Research Labs - in Malibu, California - constructed the first functioning laser (1960).  A synthetic ruby crystal produced red laser light. Further research led to the development of the first gas laser - using Helium and Neon, a laser diode - made of gallium arsenide - and other variants of diode lasers.

Over the years, the range of laser types has blossomed  :  Gas  -  Chemical  -  Excimer  -  Solid State  -  Fibre-hosted  -  Photonic Crystal  -               Semiconductor  -  Dye  and Free Electron lasers have been adapted for many different elements of use, including  :  

Medicine  -  /  Bloodless surgery, eye treatment and dentistry  -  

Industry  -  /  Cutting, welding and marking  -

Defence  -  /  Monitors, countermeasures and alternatives to radar  -

Outer Space  -  /  Measurements of different cosmic bodies  -

Research  -  /  Spectroscopy, scattering and interferometry  -

Cosmetics  -  /  Treatments for skin and hair conditions  -

Business  -  /  Scanners and readers  -

Entertainment  -  /  DVD players, CD players and light shows  -

The future of laser technology carries the promise of greater knowledge, higher quality sound and visual entertainment and increasing improvements in our standard of living.                                                                                                                                                                                                                                                                

 
 
 
 
 

 

 

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